Question

After looking at this question, I tried the chosen answer myself!
So basically what I wrote was `

abstract class person
{

  function __construct()
  {
    // some code here
  }

  function myfunc()
  {
    $this->test();
  }

  abstract function test();
}

class employee extends person
{
  function __construct()
  {
    parent::__construct();
  }

  function test()
  {
    echo "So you managed to call me !!";
  }

}


$employee = new employee();
$employee->myfunc();`

When I run this script, I got an usual error
Fatal error: Using $this when not in object context on line 7.

So, how do I call an Abstract from the Parent Class?

• EDIT

The real thing which I am trying to do is create a DatabaseObject class which holds all the common methods of different database objects and make classes extend it.

abstract class DatabaseObject {
   abstract protected function getTableName();

   public static function find_by_id($id = 0){
        global $database;
        $class = get_called_class();

        $result_array = self::find_by_sql("SELECT * FROM ". $this->getTableName() ." WHERE _id = {$id} LIMIT 1");
        echo $result_array . "<br />";
        return !empty($result_array) ? array_shift($result_array) : false;
    }

    public static function find_by_sql($sql=""){
        global $database;
        $result_set = $database->query($sql);
        $object_array = array();
        while ($row = $database->fetch_array($result_set)){
            $object_array[] = self::instantiate($row);
        }
        return $object_array;
    }
   }
}

So this is some part of my DatabaseObject Class. My User class is as follows

class User extends DatabaseObject {
    protected static $table_name = "users";

    protected function getTableName(){
        global $table_name;
        return $table_name;
    }
}

Now, whenever I do

$user = new User();
$user->findById(1);

I get the error Fatal error: Using $this when not in object context
on the line which points to

$this->getTableName();

I hope this might help in clearing up some stuff. Is there any way I can achieve this?
Thanks!

Answer 1

Your code example works just fine, I don’t understand your issue Demo.

So the code you’ve shared is not the code you talk about with the error .